EPA engine family
Engine family 7BNZC.050SA1
If this code is printed on your emission label, this is your machine's federal record: sold under Benzhou (Usa) Vehicle Industry Group Co., Ltd., with an engine built by Chongqing Loncin, certified as street-legal scooters and motorcycles.
- Displacement
- 49cc
- Model years
- 2007
- Models certified
- 20
- Certificates
- 1
What this record says
- Sold in the US by
- Benzhou (Usa) Vehicle Industry Group Co., Ltd.
- Engine built by
- Chongqing Loncin
- Vehicle category
- Highway Motorcycle - Ia (<50cc)
- Certificate numbers
- 7BNZC.050SA1-001
What the number itself says
Reading 7BNZC.050SA1 left to right: 7 is the model-year letter for 2007, BNZ is the three-character code the EPA assigned to Benzhou (Usa) Vehicle Industry Group as certificate holder, C marks a highway (street-legal) certification, .050 is the displacement in litres, so 50cc and SA1 is Benzhou (Usa) Vehicle Industry Group's own sequence for that year. Nothing in the number names the factory — that comes from the certificate itself.
The engine, as described on the certificate
The certificate describes a four-stroke, single-cylinder engine with 2 valves per cylinder fed by carburettor, run by an ignition control module (CDI-type ignition). There is a catalytic converter in the exhaust, recorded as "TWC, single bed, open loop". The head carries a pulse secondary-air (PAIR) valve.
Rated power on the record is 2.2 kW (about 3 hp) at 7,500 rpm, driving through an automatic.
- Cylinders / valves
- 1 · 2 per cylinder
- Cycle
- four-stroke
- Fuel delivery
- carburettor
- Oxygen sensor
- no
- Engine control
- ICM
- Catalytic converter
- TWC, single bed, open loop
- Air injection
- PAIR
- Rated power
- 2.2 kW (≈3 hp)
- Rated speed
- 7,500 rpm
- Transmission
- automatic
- Sales area
- 50S
- Vehicle built by
- Benzhou Vehicle Industry Group Co., Ltd.
- Test vehicle model
- YY50QT
Filing history and where it was sold
Benzhou (Usa) Vehicle Industry Group filed one certificate under this family, for model year 2007, sold as 50-state, California included.
The vehicle itself is recorded as built by Benzhou Vehicle Industry Group Co., Ltd. in China, while the engine came from Chongqing Loncin. Chassis parts and engine parts therefore have different origins.
Certified emission levels: CO 3.1, HC 0.25, NOx 0.62 g/km.
Models certified under 7BNZC.050SA1
Every model designation the importer listed on this certificate. If your machine's model name appears here, this is the right record — even if the name on the bodywork is slightly different.
YY50QT · YY50QT-10 · YY50QT-11 · YY50QT-12 · YY50QT-13 · YY50QT-14 · YY50QT-15 · YY50QT-2 · YY50QT-20 · YY50QT-21 · YY50QT-22 · YY50QT-25 · YY50QT-26 · YY50QT-3 · YY50QT-4 · YY50QT-5 · YY50QT-6 · YY50QT-7 · YY50QT-8 · YY50QT-9
Other American badges on engines from the same factory
Related in the registry
Source. US EPA annual certification data — EPA Certified Highway Motorcycle Test Results, MY2006-present; EPA Certified Off-Road Motorcycle / ATV / UTV / Rec Vehicle, MY2006-present. Retrieved 2026-09-07. Full provenance and method.